/*
 * Copyright 2011 J. Auer, J. Andert, F.-J. Jendrusch, U. Celebi
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package de.fuberlin.replication.application;

import de.fuberlin.replication.library.Metadata;

/**
 * Abstract synchronizable application implementation.
 */
public abstract class SynchronizableAbstract implements Synchronizable {
	@Override
	public void onSynchronizationStart() {
	}

	/**
	 * Default conflict solution algorithm. Always choose the newer object based on their update timestamp. If both
	 * objects were updated on the same time, choose the local object.
	 */
	@Override
	public Metadata onSynchronizationConflict(Metadata local, Metadata remote) {
		if (local.getTimestamp() < remote.getTimestamp())
			return remote;

		return local;
	}

	@Override
	public void onSynchronizationException(Exception e) {
	}

	@Override
	public void onSynchronizationStop() {
	}

	@Override
	public void onUpdateStart(String name) {
	}

	@Override
	public void onUpdateException(String name, Exception e) {
	}

	@Override
	public void onUpdateStop(String name) {
	}
}